Welcome to TFP!
Nope, once all your levels are in the right range, you'll have beautiful clean water! Don't get me wrong, it will take a little bit of time to get that cleared up because there's no such thing as a magic potion that you add once and be done.
Hard water will not be an issue, there are easy ways to manage that.
Read up on the SLAM article. It will be your best friend until your water is clear.
Since this is a used pool, there may have been some "stuff" left on the pool or in the filters when it was put away and that's come out now to cloud your water.
And no more "blue" products, only bleach. The items with "blue" in the name have copper in them.
ok guys, I'm starting over. Probably not necessary, but I've got some people coming over this weekend and I'd like to have the pool open. I think a big mistake I made was not cleaning the pool properly before filling it. It had some black stuff on the liner I sprayed some simple green on, but that clearly was not enough. I have access to a pump that will get all the water out in about 3 hours. I'm then going to scrub the liner with a diluted bleach solution. My recommendations on how much to dilute it? Once clean, I'll start refilling. My main question is this....should I proactively add some bleach to the water as it's filling? I have ordered a tf100 test kit but do not have it on hand yet. I do have an aqua hen kit from Walmart but I've been told it's worthless. The pool holds 6700 gallons...is there a formula that will get me close enough to start with?
thanks